I am building a keezer with coffin box based on this design: (credit cgolden101 @ homebrewtalk. Here is the thread about his build -- https://www.homebrewtalk.com/forum/threads/ge-7-0-coffin-keezer-build.392842/ ) I'm thinking about sealing up the back of the box and leaving the top so that it can be removed for access. I see that most people building these leave access from the back. I am not planning on putting anything in the coffin except two fans and the beer lines and the box will be big enough to get my hands in to work. Is there a reason that I'm not thinking about to leave the back open?